Finding the Fourth Proportional to 3,505.36, 5,258.56 and 1,039.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,505.36 : 5,258.56 = 1,039.89 : x
2. Step 2: Convert to fraction form
   3,505.36/5,258.56 = 1,039.89/x
3. Step 3: Cross multiply
   3,505.36x = 5,258.56 × 1,039.89
4. Step 4: Simplify right side
   3,505.36x = 5,468,305.54
5. Step 5: Solve for x
   x = 5,468,305.54/3,505.36
6. Step 6: Final answer
   x = 1,559.99